I would prefer they not pursue the mother of Wonder Woman angle.
Since the prequel comic is canon, I see no reason why not to use the character; it would allow DC to expand its cinematic mythology, without having all of the pressure on the Superman films.
*I will forgive the writers of Man of Steel, if Superman is the Enlightened Sun God he is supposed to be, in Superman vs. Batman. Quite simply, Superman does not kill. The writers of MOS failed to grasp this, to this film's detriment.
Favorite CBMs: 1) X2 2) The Avengers 3) CA:TWS 4) Watchmen 5) Batman: MOTP 6) The Dark Knight Rises 7) Thor: TDW 8) TASM 9) IM3 10) S/B: Apocalypse